> *1.* When I'm at the terminal prompt inside of GNU Screen, I can move

> between words using Ctrl + arrows without any problem. However, if I call
> Emacs (with the command "emacs-snapshot-gtk -nw"), and I press Ctrl-<right>
> I get the characters "5D." I get the characters "5C" when I press
> Ctrl-<left>.

I can replicate this behavior. It looks like a escape code translation
error, but I can't pin it down. As you are using gnome-terminal which
seems to be setting TERM=xterm, you should be able to get away with
locally changing TERM for emacs, not a perfect workaround but it seems
to work here. For example you could run this within screen:

TERM=xterm emacs -nw somefile

[...]

--
HTH
Thor

Thanks so much!!
After changing the value of the TERM variable to "xterm" the Ctrl key works as usual within emacs.

I also had a similar problem with the Shift + arrow keys but this
problem also disappears after I change the value of the TERM variable.